I bought a Sony 32" LCD TV in March and discovered within a week that were light patches on the corners of the screen which were very prominent while viewing any material that had dark backgrounds (eg the numerous night-time scenes in a movie like "Signs").
I did some checking on the net and found this was a problem reported with Sony's Bravia series of TVs in several countries, including the US and Australia. I got in touch with Sony's customer care section and asked for a replacement set, failing which I said I would approach the local consumer court. I also brought to their attention all the material available on the net regarding the problem with the Bravia TVs.
Two Sony engineers who visited my home initially tried to spend hours explaining to me that there was nothing wrong with my TV. I put my foot down and insisted on a replacement. As I am a journalist, I also took up the matter with people in Sony at a higher level.
Imagine my surprise when Sony decided a few days later not to replace the TV but to REFUND my money -- something I had not even asked for. Just confirmed my suspicion that there is something seriously wrong with the Bravia series.
I am now a happy owner of a Samsung 32" LCD TV. Its controls are not as sophisticated as that of the Sony, but at least it doesn't have the patches and is about Rs 7,000 cheaper.